[PATCH v2 06/25] powerpc32: iounmap() cannot vunmap() area mapped by TLBCAMs either

From: Christophe Leroy
Date: Tue Sep 22 2015 - 12:59:32 EST


iounmap() cannot vunmap() area mapped by TLBCAMs either

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
No change in v2

arch/powerpc/mm/pgtable_32.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 7692d1b..03a073a 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -278,7 +278,9 @@ void iounmap(volatile void __iomem *addr)
* If mapped by BATs then there is nothing to do.
* Calling vfree() generates a benign warning.
*/
- if (v_mapped_by_bats((unsigned long)addr)) return;
+ if (v_mapped_by_bats((unsigned long)addr) ||
+ v_mapped_by_tlbcam((unsigned long)addr))
+ return;

if (addr > high_memory && (unsigned long) addr < ioremap_bot)
vunmap((void *) (PAGE_MASK & (unsigned long)addr));
--
2.1.0

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